.clearfix::before,.clearfix::after{
    content: '';
    display: table;
    clear: both;
}
body{
    font: 14px/1.5 Helvetica Neue,Helvetica,Arial,Microsoft Yahei,Hiragino Sans GB,Heiti SC,WenQuanYi Micro Hei,sans-serif;
    color: #333;
}
/*表示中间容器的宽度*/
.w{
    width: 1226px;
    margin: 0 auto;
}
a{
    text-decoration: none;
    color: #333333;
    /*display: block;*/
}